Personal experience: Trainor said her time growing up as a 'chubby kid' inspired the hit single, which has been No.1 in both the US, Australia, Canada and New Zealand

It seems to have worked for the singer/songwriter, who has been dubbed the next Taylor Swift for her ability to blur the lines between country and pop.

Like Swift, Trainor she was signed by a major record label when she was still a teenager and would take regular trips in highschool to write songs for the likes of Rascal Flats.

Moving to Nashville at 19, she originally penned All About That Bass for another star before deciding that she would keep it for herself.

The result has been a musical phenomenon.

Teen prodigy: She was signed while still in highschool and wrote song for several country artists, including Rascal Flats

Worldwide appeal: The message has women all around the world sending Trainor messages of support

From Slovakia to Ireland the message has resonated, and ahead of her first trip to Australia in September to promote her debut EP Title, she says she's looking forward to seeing the effect it has had Down Under.

'I get a lot of support from a bunch of girls in Australia tweeting me to sending me selfies saying how they didn't love themselves and would get bullied,' she said.

'Then they heard my song and burst into tears because no one has ever spoken for them before.

'It's crazy, the fanbase seems to be everywhere.

Down Under: The talented performer is coming to Australia for the first time in September to promote her debut EP Title

The next Swifty: Like Taylor Swift, Trainor was signed my a major record label as a teenager and while still in highschool - she also crosses the boundaries between country and pop

'I get everything from lil' babies dancing on Instagram to mums and grandmums sending me videos of themselves shaking their booty to my song.